Indie game storeFree gamesFun gamesHorror games
Game developmentAssetsComics
SalesBundles
Jobs
Tags

I can't really help but I was looking around & someone on YouTube has like 3 stream archives of working on a Miku Hatsune model that does this. Not a tutorial but they recorded themself making it so if you skim around you might figure things out.(Sorry it's a bit long but you kinda just need to skim around while checking the preview when you move your mouse around on the loading bar)

Just kinda know you need certain parts you want to move a little to be their own layer. So you can see the bangs, side bangs, ears & a little bit of hair on the shoulders move, those are their own layer.(Though bangs & side bangs are together from the looks of it)

Can you drop a link or the name of the person that did those streams?  I tried looking around but can't find them

Sorry don't check on here often so didn't see your response, I went checking & you're in luck they made a video tutorial series on the thing

Link to tutorial playlist

Link to playlist of their archived live streams working with HONK you can skim to figure things out